环氧树脂固化工艺优化研究  

Optimization of Epoxy Resin Curing Process

作　　者：蔡程帆 李超群[1] 张奇 刘一帆 于人同[1] 李雄 魏忠正 CAI Cheng-fan;LI Chao-qun;ZHANG Qi;LIU Yi-fan;YU Ren-tong;LI Xiong;WEI Zhong-zheng(School of Materials Science and Engineering,Hainan University,Haikou 570228,China;Hainan Jinpan Smart Technology Co.,Ltd.,Haikou 570216,China)

机构地区：[1]海南大学材料科学与工程学院,海南海口570228 [2]海南金盘智能科技股份有限公司,海南海口570216

出　　处：《塑料科技》2023年第9期60-63,共4页Plastics Science and Technology

基　　金：国家自然科学基金(52263009);海南省重点研发项目(ZDYF2021GXJS030)。

摘　　要：环氧树脂干式变压器因固化时间过长对工效及能耗产生不良影响。文章经非等温固化动力学研究双酚A环氧树脂/甲基四氢苯酐/硅微粉体系的反应活化能和反应级数,通过外推法确定最佳固化温度;并根据多阶等温差示扫描量热实验推断可缩短后固化时长,进而研究固化时长对材料玻璃化转变温度、力学性能和介电性能的影响。结果表明:体系反应活化能和反应级数分别为82.744 kJ/mol和0.951,初始固化温度、固化温度和后固化温度分别为79.05、164.19和194.30℃;固化总时长缩短1 h后,所得材料玻璃化转变温度、弯曲性能、缺口冲击性能和介电性能均与优化前样品相当接近。The long curing time of epoxy resin dry type transformer has a negative impact on the efficiency and energy consumption.The reaction activation energy and reaction order of bisphenol A epoxy resin/methyl tetrahydrophthalic anhydride/silica powder system were studied by non-isothermal curing kinetics,and the optimum curing temperature was determined by extrapolation method.According to the multi-stage isothermal differential scanning calorimetry experiment,it is inferred that the post-curing time can be shortened,and then the effect of curing time on the glass transition temperature,mechanical properties and dielectric properties of the material was studied.The results show that the activation energy and reaction order of the system are 82.744 kJ/mol and 0.951,respectively.The initial curing temperature,curing temperature and post-curing temperature are 79.05,164.19 and 194.30℃,respectively.After the total curing time is shortened by 1 h,the glass transition temperature,flexural properties,notched impact properties and dielectric properties of the obtained materials are quite close to those of the samples before optimization.

关 键 词：环氧树脂 固化动力学 介电性能 力学性能 干式变压器 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]